18(35.] Contributions to Indian Malacology. 77 



roundly lunate, almost circular ; peristome thin ; margins distant, 

 eoluniellar slightly expanded. 



Millem. inch. 



Major diameter, 4 0.16 



Minor ditto, 3f 0.15 



Axis, 3 0.12 



Habitat — Arakan hills : rare. 



A prettily marked little species near H. Bascauda, Bens., from 

 which it is distinguished by its finer and closer sculpture, more open 

 umbilicus, and less conical spire. It is very probably a Nanina, but 

 the animal was not met with. 



Genus BULIMUS. 



16. B. scrobiculatus, n. sp. 

 Shell subobtectly perforated, turritedly ovate, thin, horny, yellowish 

 white, marked with vertical, subarcuate, rather irregular, closely set, 

 raised lines. Spire turrited, apex obtuse, suture simple, impressed. 

 Whorls 6, convex, the last rounded beneath. Aperture vertical, 

 truncately ovate : peristome simple, thin ; right margin considerably 

 carved forwards ; eoluniellar vertical, curving to the left near the base, 

 frequently straight, rather broadly reflexed. 



Millem. inch. 



Length, 7 0.28 



Diameter, 3J 0.14 



Length of aperture, '. 3 \ 0.14 



Habitat — Pegu, west of the Irawady. 



The nearest ally of this species is its congener B. putus, Bens., 

 which inhabits the same localities, and differs in its greater tumidity 

 and less marked sculpture. There is, however, much variation in the 

 first named character, and despite the great difference between the two 

 forms in general, there is some appearance of a passage. Two speci- 

 mens of B. putus which I possess, measuring respectively 7 and 8J 

 millem. in length, are both 5 millem. in diameter. 



Both these species shew a tendency to a passage to Spiraxis. 



17. B. plicifer, n. sp. 

 Shell obtectly perforated, ovately conical, rather thin, horny, finely 

 striated. Spire conical, apex obtuse ; suture marginate, scarcely 

 11 



